Question

因此，我使用vininfo仅使用其VIN从外部数据库填充有关某些单元的信息，并使用此数据，我正在使用dict将其转换为annotate()或annotate().items()，但脚本崩溃了

TypeError: cannot unpack non-iterable NoneType object

使用hasattr(obj, 'attr')尝试过，但爆炸时出现相同的错误。由于对象不是可迭代的for..in，因此无法使用TypeError: 'NoneType' object is not iterable进行迭代。

我尝试使用具有相同VIN的CLI版本，它吐出了同样的cannot unpack错误。

问题是我用来测试的VIN缺少一些准确的数据.transmission（但我想其他任何字段都会发生），可能是由于填写注册表时的拼写错误所以我试图忽略此字段，但我不能，因为它不存在！

VIN是：1NKZXPEX4GJ109010

回溯如下：

Traceback (most recent call last):
  File "c:\program files\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\program files\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\Python37\Scripts\vininfo.exe\__main__.py", line 7, in <module>
  File "c:\program files\python37\lib\site-packages\vininfo\cli.py", line 51, in main
    entry_point(obj={})
  File "c:\program files\python37\lib\site-packages\click\core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "c:\program files\python37\lib\site-packages\click\core.py", line 717, in main
    rv = self.invoke(ctx)
  File "c:\program files\python37\lib\site-packages\click\core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\program files\python37\lib\site-packages\click\core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\program files\python37\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\program files\python37\lib\site-packages\vininfo\cli.py", line 35, in show
    out(details)
  File "c:\program files\python37\lib\site-packages\vininfo\cli.py", line 24, in out
    for k, v in annotatable.annotate().items():
  File "c:\program files\python37\lib\site-packages\vininfo\common.py", line 17, in annotate
    value = getattr(self, attr_name, no_attr)
  File "c:\program files\python37\lib\site-packages\vininfo\details\_base.py", line 53, in __get__
    return DetailWrapper(instance, self)
  File "c:\program files\python37\lib\site-packages\vininfo\details\_base.py", line 20, in __init__
    attr_name, attr_idx = detail.source
TypeError: cannot unpack non-iterable NoneType object

Answer 1

您可以强制传输到空白列表：

Model A "buildings"
 - time_built
 - description
 - adress
 - architects[]=Model C
 - places

Model B "photos":
 - time_taken
 - title
 - architects[]=Model C
 - places

Model C "architects"
- title
- time_born
- website
- items[]=Model A+Model B

是否有办法知道对象内部是否具有不可迭代的NoneType对象

1 个答案: